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(No Modelj 2 Sheets-Sheet l.

C. W. ISBELL. HYDRAULIC MAN POR GAS WORKS. 1\1o.811,585.v i] Patented Feb. 8,1885. l

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(No Model.) 2 Sheets-Sheet 2.

C. W. ISBELL. HYDRAULIC MAIN POR GAS WORKS.

No. 311,585. 'PAAAAAAAFAA 3,1885.

IIIIIIHIIIIII VH I 1 N. PETERS, PlwtaALIlmgmphnr. washinplan4 D. C.

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CHARLES XV. ISBELL, OF NE\V YORK, N. Y.

HYDRAULIC MAIN FOR GAS=WORKS.

.CDECIFICAI'ION forming part of Letters Patent NG, 311,585, dated February 3, 1885.

Application filed January 29, 18S-1. (No model.)

T0 @ZZ whom, it may concern:

Bc it known that I, CHARLES W. Is'BELL, of the city and county of New York, in the State of New York, have invented anew and useful Improvement in Hydraulic hIains for Gas-\Vorl s, of which the following is a specilication.

In gas-works as commonly constructed the hydraulic Ina-in is arranged transversely to and above the bench of retorts, and from the mouthpiece of cach retort a stand-pipe extends upward, and is connected by a bridge-pipe with the dip pipe, which extends downward into the hydraulic main and below the liquid-level therein.

My invention relates to that class of hydraulic mains which are provided opposite the several dip-pipes with a corresponding number of lateral casings or branches separate from and independent of each other, communicating with the interior of the main below the liquid-level therein, and having their outlets or mouths presented on the exterior of the main above the liquid-level therein, and provided with separately1'emovable lids or covers. Thetar and other matter which accumulates below each dip-pipe can be then withdrawn from the main by separately removing the lids or covers ot' the casings or lateral branches, and while the works are in operation.

The invention consists in a hydraulic main having` a number of dip-pipes extending vertically downward into it, provided in its bottom with depressions or pockets directly below the downwardly presented ends of the vertical dip-pipes, and havinglateral branches or cleaning-holes extending from the depressions or pockets to the exterior of the main above the liquid-level, and there provided with separately-removablelids or covers. The depressions or pockets in the bottom of the main itself form receptacles into which t-he tar falls from the dip-pipes, and prevent the tar from spreading over the bottom of the main.

The invention also consists in making the bottom of the depressions or pockets and the back of the cleaning-holes or lateral branches curved or rounded in a direction transverse to the main and straight in a direction length wise of the main, whereby the removal of tar and other foreign matter by a hoe or like implement introduced through a hole or branch is facilitated.

The invention also consists in other novel features in the construction of the main and its cleaning-holes, and in the manner of securing the covers of the cleaning-holes or branches, which are hereinafter particularly described, and pointed out in the claims.

In the accompanying drawings, Figure l is a front elevation of a bench of retorts and a hydraulic main embodying my invention. Fig. 2 is a sectional elevation on the dotted line x w, Fig. l. Fig. 3 is a plan thereof. Fig. 4 is a transverse vertical section of the improved main and a dip-pipe on a much larger scale. Fig. 5 is a side view on the same scale as Fie. 4, illustrating a short portion of the main, the cover of the cleaning-hole or branch being removed; and Fie. 6 is a plan thereof, the dip-pipe and said cover both being removed.

Similar letters of reference designate corrc spending partsin all the iigures.

A designates the mouth-pieces of the retorts, five of which are here shown 5 and B designates the stand-pipes, which. rise there` from and are connected near their upper ends by bridge-pipes C with the dip-pipes D, as best shown lin Fig. 2. This is a usual construction, and the upper ends of' the stand` pipes B and dip-pipes D are closed by the usual Stoppers, b d,which are luted with clay in the usual way. The lower portions, D', of the dip-pipes D are made separate from the portions with which the bridge-pipes C con neet, and are secured each by a flanged joint. a, to an upwardly-proj ecting branch, a,formed on the hydraulic main E. The main E,which is of cast metal, is preferably of round or oval transverse section, the major axis being vertical if the main is oval, and the lianges C at the ends of each section ot' the main rest in curved cradles C', which are supported by castron saddles, C, and are provided with screws C, whereby the main may be leveled.

At the side of the mainEare cleaiiing-holes or transverse branches E', and I prefer to pro` vide such a cleaning-hole or branch opposite each dip-pipe D D.

The construction of the main E with said cleaning-holes or-branches l and all other IOO features of the invention are best shown in the large views, Figs. 4, 5, and 6, to which I now particularly refer.

The dip-pipe D extends downward below the liquid-level e to the desired extent, and there is in the main but a single gas-space, e', unbroken by any partition, and to which there are no openings save the necessary gas-outlet. The flanges a, forming the joints between the necks or upwardly-extendii'ig branches a and the dip-pipes D', are faced, and when once packed and bolted together form vpermanent gas-tight joints. It will therefore be seen that there are no openings into the gas-space e which are closed by covers or plates requiring to be often removed and replaced, as is the case where hand-holes are formed in the sides ofa main above theliquid-level, and not only is the cost of construction of the main lessened, but the liability of any leakage of gas therefrom is greatly reduced. The mouth f of each cleaning-hole or brauch E/ is above the liquid-level e, and theopeningf, by which the cleaning-hole or branch communicates with the interior of the main, is entirely below the liquid-level, as shown in Fig. 4.

Directly below each dip-pipe D is a depression, pocket, or sunken portion, g. inthe bottom of4 the main, and the cleaning-hole or branch E forms a transverse and rounded continuation of such depression or pocket, or a transverse and rounded continuation of the bottom of the main when no such depression or pocket is provided. The back g of the cleaning-hole or branch, although curved outward and upward in a direction transverse to the main, is preferably flat or straight in a direction lengthwise ofthe main, as best shown in Figs. 5 and 6, and in the present example of my invention the transverse section of the cleaning-hole or branch is rectangular, as

lshown best in Fig. 6. The mouth f of the cleaning-hole or branch E is presented upwardlyon the exterior' of the main, and is shown as inclined downward and outward from the side of the main. The cleaning-holes or lateral branches have no communication whatever with the gas-space of the main, and

hence do not contain gas which will escape when the lids or covers are removed. Itis closed by a cover, F, which, as shown, has a projection or lip, 7i, entering the mouth f, and extending around three sides thereof, thus preventing said `cover from sliding downward andv outward or laterally. In the under side ofthe cover F is a groove, z', which provides for luting the cover with clay to form a tight joint between it and the mouth f. The cover F is secured by a singlebolt, j, which passes through a hole in the cover, and through a slotted lug or car, K, projecting horizontally from the mouthf at the lower and outer side thereof.

At the upper side of the cover F is a lug or ear, l, which fits under a lug or ear, Z, cast on the side of the main. To remove the cover it is only necessary to loosen the nut of the bolt j sufficiently to raise the lip h from the mouth fat the lower side thereof', and the cover may then be slipped off. To replace the cover the groove i is filled with clay, and the lug-or ear Z is slipped back under the lug or ear Z until the lip h will drop into the mouth f. The nut ofthe bolt j is then tightened to securely fasten the cover. Then the cover F is removed, there can be no escape of gas, as the opening f/ is below the liquid-level e, and consequently the making of gas need not to be interrupted. A hoe or other suitable implement is then introduced through the cleaninghole or branch E', and all matter deposited below the dip-pipe D, whether it be clay, carbon, or either or both of these substances, with a deposit of hard tar, can be readily and completely withdrawn. rIhe depression or pocket g and the making of the back g of the branch E straight in a direction lengthwise of the main and rounded in a direction transverse to the main greatly facilitate the withdrawal of the deposit. The depression g keeps the deposit from shifting lengthwise of the main when a hoe or implement is applied to it, and by the use of a hoe having a straightedged blade of a width todrop into the depression g the deposit can be completely removed.

I am aware of patent to William Beal, granted August 16, 1881, and numbered 245,767, and do not claim anythingy therein shown or described as of my invention. In said patent there are no depressions or pockets in the bottom of the main; but at the side thereof are laterally-proj ecting casings, which communicate with the main below the liquidlevel therein, and the mouths of which are above the liquid-level, and are provided with separately-removable lids or covers. In this patent the dip-pipes are not extended vertically downward into the main, but arek vertical down to the main, and within the main are inclined at a sharp angle, to direct them toward the openings which communicate with the laterally-projecting casings. Such inclined pipes are not so desirable as my directly-vertical dip-pipes, because the tar and any wet clay falling from the luting of the Stoppers at the top of the dip-pipes will Abe liable to lodge against the inclined back of the dip-pipes and soon form an obstacle which will clog them. Neither can such inclined dip-pipes be as readily cleaned as straight pipes, because the inclined portion cannot be reached by a cleaning-rod introduced from above.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. Ahydraulicmainhavinganumberof dippipes extending vertically downward into it, provided in its bottom with depressions or pockets directly below the downwardly-presented ends of the vertical dip-pipes, and having cleaning-holes or branches extending from IOO IIO

ihe depressions or pockets to the exterior of the main above the liquid-level, and there provided with separately-removable lids or covers, substantially as and for the purpose herein described.

2. A hydraulic main having at the side a cleaning-hole or branch7 the mouth of which is presented at the exterior of the main above the liquid-level therein, and which communicates with the interior thereof below the liquid'level therein, the back of such cleaningholc or branch being curved or rounded in a direction transverse to the inain and approximately straight in a direction lengthwise of the main, substantially as and for the purpose herein described.

3. A hydraulicinain having in the bottoni and below the liquid-level a depression or pocket. and having a cleaning-hole or branch extending from such depression or pocket upward and outward to a point above the liquid-level in the main, the bottoni of said depression or pocket andthe back of said cleaning-hole or branch being curved or rounded in a direction transverse to the main and straight in a direction lengthwise of the inain, substantially as and for the purpose described.

Ll.v The combination, with the hydraulic main E, having` the cleaning-hole or transverse branch E, communicating with the interior thereof at f and having its mouthf inclined downward and outward from thesidc of the main, of the cover F, provided with a lip, 72 entering said mouth on the lower side or back thereof, substantially as and for the purpose herein described.

5. The combination, with the hydraulic inain E, having the cleaning-hole or transverse branch E, communicating with the interior thereof atf, and the mouth of which is inclined downward and outward from the side of the main, and also having the lugs or ears Z and K, of the cover F, fitting under said lug or ear Z at its upper edge, and the boltl j, securing the cover at its lower edge, substantially as and for the purpose herein described.

CHAS. XV. lSBELL.

\Vitnesses:

C. HALL, HARRY Boem?. 

